KR100264277B1 - Intake manifold for autombile - Google Patents

Abstract

PURPOSE: A vehicle intake manifold is provided to supply sufficient air, and to prevent lowering of output by adjusting the sectional area of an intake manifold proportionally according to change of flow rate. CONSTITUTION: An intake manifold(10) comprises a hole(13); first fixing grooves(11); second fixing grooves(11a); a slide groove(12); a hollow louver(23) having a first stopper(21) inserted to the fixing groove and a fixed end(22); and a variable unit inserted to the fixed end of the hollow louver and the second fixing groove. The intake manifold connects a surge tank and an intake port of a cylinder head, and has a fuel injector with the hole in the upper part. The complete combustion is performed, and the lowering of the output is prevented by supplying the optimal air to a cylinder with varying the sectional area according to pressure of the intake manifold during traveling.

Description

Intake Manifold for Automotive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake manifold for an automobile, and in particular, an intake manifold for an automobile in which the cross-sectional area in the intake manifold is changed according to negative pressure, thereby increasing the amount of air sucked into the cylinder to prevent the output from being lowered. It is about.

In general, a vehicle inhales a mixture of air and fuel into a cylinder through an intake machine, and converts the inflation force generated by repeating compression, ignition, and exhaust into torque to enable driving.

Depending on the state of inhaling the mixer into the cylinder, it is divided into vaporization type (carburetor type) and direct injection type.

In other words, the carburetor type is to mix the fuel mixed with the fuel through the throttle body into the cylinder through the intake medium fold connected to the surge tank to be compressed and ignited. It is used as a direct injection method by injecting the amount of fuel into the intake manifold or combustion chamber to use the electronic control unit to compare the applied signal with the reference value.

1 is a schematic configuration diagram of an engine in a state where a general intake machine is installed, in which the exhaust system and the intake machine are provided at both sides.

The intake system allows the air and fuel necessary for combustion to be sucked into the cylinder, and is composed of an air cleaner 210, a throttle body 220, a surge tank 230, and an intake manifold 240, and an exhaust system ( 300 is composed of an exhaust manifold (not shown), a catalytic converter, and a muffler.

The air cleaner 210 of the intake machine includes a housing 212 having an inlet 214 and an outlet at one side thereof, and an element 213 for removing dust and the like contained in the air inside the housing 212. do.

The throttle body 220 has a throttle valve 221 hinged therein so as to adjust the amount of air flowing from the air cleaner 210, and to the discharge side of the air cleaner 210 by the duct 216. Connected.

The surge tank 230 is formed to have a predetermined space therein so as to store air that has passed through the throttle body 220, and extends to the throttle body 220.

In addition, the intake manifold 240 is connected to the surge tank 230 and the intake port of the cylinder head, and has a hole formed therein so that the fuel injection injector 242 is installed, and the inside thereof has a constant cross-sectional area. Formed.

In addition, in order to accelerate the flow rate of the mixer to be sucked into the cylinder may be formed so that the cross-sectional area is gradually reduced.

The fuel injection injector 242 is connected to an injector pump (not shown), and is configured to inject the fuel transferred from the fuel tank to the suction power of the pump at the initial stage of the suction stroke and be sucked in a mixed state with air.

The process of generating power through the intake machine configured as described above is as follows.

During the suction process in which the piston installed in the cylinder block moves from top to bottom, negative pressure is generated, and at the same time, the negative pressure causes the oil to flow through the element 213 installed therein through the inlet 214 of the air cleaner 210. While the substance is removed, the air flows into the duct 2160 and flows into the surge tank 230 via the throttle valve 221 installed at the end thereof.

Air introduced into the surge tank 230 flows in the intake manifold 2400 connected thereto.

At this time, a small amount of fuel discharged from the injector pump (not shown) is injected into the intake manifold 240 through the injector 242, and is introduced into the cylinder through the inlet of the head in a mixed state with air, thereby compressing, Power is generated through the process of ignition and exhaust to enable driving.

However, since the cross-sectional area of the intake manifold is manufactured at a constant speed, the air flow rate is low at low output, and at high power, the flow rate is increased. have.

Therefore, the present invention has been devised to solve such a problem, so that the cross-sectional area can be proportionally adjusted in accordance with the change of the flow velocity in the intake manifold to supply sufficient air (mixer) according to the engine output demand. It is therefore an object of the present invention to provide an intake manifold for automobiles capable of preventing a decrease in output.

1 is a schematic configuration diagram of an engine when a general intake machine is installed;

2 is a cross-sectional view showing the internal structure of the intake manifold according to the present invention;

3 is an exploded perspective view of an intake manifold according to the present invention;

4 is a cross-sectional view showing the internal structure of another embodiment according to the present invention;

* Description of the symbols for the main parts of the drawings *

10; intake manifold 11; first fixing groove

11a; 2nd fixing groove 12; Slide groove

13; hole 21; first stopper

22; fixed end 22b; sliding rack

23; hollow louver 24; wrinkles

25; second stopper 26; bellows

30; pinion

The present invention for achieving the above object is connected between the surge tank and the intake port of the cylinder head, the hole is formed in the upper portion of the intake manifold in which the fuel injection injector is installed, the hole and the plurality of first fixed An intake manifold formed integrally with the groove, the second fixing groove, and the slide groove, the first stopper inserted into the first fixing groove, the fixed end of the hollow louver, and the variable means inserted into the second fixing groove. It is achieved by the intake manifold for automobiles, characterized in that.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view showing the internal structure of the intake manifold according to the present invention, Figure 3 is an exploded perspective view of the intake manifold according to the present invention, Figure 4 is a cross-sectional view showing the internal structure of another embodiment according to the present invention The same reference numerals are used for the same configurations as the conventional configurations.

The intake system allows the air and fuel necessary for combustion to be sucked into the cylinder, and is composed of an air cleaner 210, a throttle body 220, a surge tank 230, and an intake manifold 240, and an exhaust system ( 300 is composed of an exhaust manifold (not shown), a catalytic converter, a muffler, and the like to be connected to the cylinder head.

The throttle body 220 has a throttle valve 221 hinged therein so as to adjust the amount of air flowing from the air cleaner 210, and to the discharge side of the air cleaner 210 by the duct 216. It is connected.

The air cleaner 210 includes a housing 212 having a suction port 214 and a discharge port on one side thereof, and an element 213 for removing dust and the like contained in the air into the housing 212.

The surge tank 230 is formed to have a predetermined space therein so as to store air that has passed through the throttle body 220, and extends to the throttle body 220.

The intake manifold 240 is connected to the surge tank 230 and the intake port of the cylinder head. The inlet manifold 240 is provided with a hole in the upper portion thereof, and the fuel injection injector 242 is installed, and the inside thereof is formed to have a constant cross-sectional area. have.

In addition, the fuel injection injector 242 injects the fuel transferred from the fuel tank to the suction power of the pump and sucks it in a mixed state with air to generate power while undergoing a process of compression and ignition exhaust. In the manifold,

This embodiment is to install a hollow louver tube whose cross-sectional area is changed in accordance with the flow rate of air in the intake manifold to control the flow of air.

That is, the hollow louver 23 is provided inside the intake manifold 10, and is made of variable means for applying tension to the hollow louver 23.

The intake manifold 20 is formed to have a cross section of a closed curve having a short axis and a long axis. The intake manifold 20 has the same cross-sectional area of the inlet and the outlet, or its cross-sectional area is reduced at a constant rate toward the outlet (cylinder head). do.

The inside of the intake manifold 20 is formed with a hole 13 through which atmospheric pressure is applied, and the first fixing groove 11 and the second fixing groove 11a are formed at both sides of the hole 13. And a slide groove 12 which is connected to the second fixing groove 11a integrally.

The hollow louver 23 has a cylindrical shape and is provided with ring-shaped first stoppers 21 at both sides thereof to be inserted into the first fixing grooves 11, and at the other end thereof, the hollow louvers 23 have the same shape as the first stoppers 21. The stage 22 is integrally inserted into the slide groove 12.

And this fixed end 22 is provided with the variable means inserted into the 2nd fixing groove 11a.

The variable means supports the hollow louvers 23 whose diameters change in accordance with the change of the negative pressure, and the bellows portion 24 is formed on the outside and the second stopper 25 is integrally formed at the end. It is provided with 26 and is fixed to the 2nd fixing groove 11a.

In addition, as shown in Figure 4, the variable means provided on one side of the hollow louver is installed on the inside of the intake manifold 10 with the pinion 30 engaged with the sliding rack 22b provided at the end thereof. And an electronic control unit electrically connected to a negative pressure sensor for measuring a negative pressure change in the intake manifold.

The operation of the present invention configured as described above is as follows.

When the engine is low speed, high negative pressure is generated in the intake manifold 10, and at the same time, the hollow louver 23 is concave toward the center to form a venturi to accelerate the air sucked in so that a large amount of intake is allowed to be completely burned. It becomes possible.

At this time, the atmospheric pressure acts between the holes 13 formed on one side so that the outside of the hollow louver 23 is spaced apart from the inner wall of the intake manifold 10 and the bellows 26 fixed to the fixed end 22. Since the second stopper 25 formed at the end of the c) is inserted into the second fixing groove 11a, the second stopper 25 is increased by the size of the negative pressure.

At high speeds, as the air velocity increases, the negative pressure acting in the intake manifold 10 decreases, so that the hollow louvers 23 move along the slide grooves 12 due to the tension of the bellows 26, thereby increasing the cross-sectional area thereof. The large diameter allows a large amount of air to flow into the cylinder quickly.

On the other hand, in the case of using the negative pressure sensor, the value is signaled from the negative pressure sensor that measures the pressure generated in the intake manifold and applied to the electronic control unit, which is compared with the reference value, and the difference By applying a current corresponding to the servo motor to drive the pinion 30, the rack is moved back and forth to change the diameter of the hollow louver to adjust the amount of air sucked into the cylinder.

As described above, according to the present invention, the cross-sectional area is varied according to the negative pressure in the intake manifold that is generated while driving to supply the air of optimum state into the cylinder to enable complete combustion and to prevent the output from falling. will be.

Claims (4)

In the intake manifold, which is connected between the surge tank and the intake port of the cylinder head, and has a hole formed in the upper portion, and has a fuel injection injector installed therein, An intake manifold 10 in which the hole 13, the plurality of first fixing grooves 11, the second fixing grooves 11a, and the slide grooves 12 are integrally formed; A hollow louver 23 having a first stopper 21 and a fixed end 22 inserted into the first fixing groove 11; Intake manifold for automobiles, characterized in that the variable end is inserted into the fixed end 22 and the second fixing groove (11a) of the hollow louver (23). The method of claim 1, Variable means connected to the hollow louver is a corrugated portion 24 is formed, the intake manifold for automobiles, characterized in that consisting of a bellows (26) formed integrally with a second stopper (25) at its end. The method of claim 1, Variable means connected to the hollow louver is a sliding rack (22b) provided at the end of the hollow louver (23a), The pinion 30 engaged with the rack 22b, Intake manifold for automobiles, characterized in that the control means for driving the pinion (30). The method according to claim 1 or 3, The control means for driving the pinion 30 includes a servo motor connected to the pinion, A negative pressure sensor for measuring the pressure in the intake manifold; An intake manifold for automobiles, comprising an electronic control unit for selectively driving a servo motor by comparing a signal of a negative pressure sensor with a reference value.

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